/Engine/Source/Runtime/OpenGLDrv/Public/OpenGLDrv.h
Locks an RHI texture's mip-map for read/write operations on the CPU
pointer to the CPU accessible resource data
virtual void * RHILockTexture2D ( FRHITexture2D * Texture, uint32 MipIndex, EResourceLockMode LockMode, uint32 & DestStride, bool bLockWithinMiptail, uint64 * OutLockedByteCount )